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linux/tools/perf/util
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Arnaldo Carvalho de Melo 9b33827de6 perf diff: Percent calcs should use double values 
Otherwise we do integer math and the delta values round up to
multiples of 1.0%.

Also, calculate absolute values. Things look precise now:

$ perf report -i perf.data.old --sort dso,symbol | head -13
     9.02%  libc-2.10.1.so               [.] _IO_vfprintf_internal
     4.88%  find                         [.] 0x00000000014af0
     2.91%  [kernel]                     [k] __kmalloc
     2.85%  [kernel]                     [k] ext4_htree_store_dirent
     2.50%  libc-2.10.1.so               [.] __GI_memmove
     2.44%  [kernel]                     [k] half_md4_transform
     2.43%  [kernel]                     [k] _spin_lock
     2.33%  [kernel]                     [k] system_call
$ perf report -i perf.data --sort dso,symbol | head -13
     8.55%  libc-2.10.1.so               [.] _IO_vfprintf_internal
     3.11%  [kernel]                     [k] __kmalloc
     3.07%  [kernel]                     [k] ext4_htree_store_dirent
     2.66%  find                         [.] 0x00000000016bcf
     2.61%  [kernel]                     [k] _atomic_dec_and_lock
     2.46%  [kernel]                     [k] half_md4_transform
     2.41%  libc-2.10.1.so               [.] __GI_memmove
     2.30%  find                         [.] 0x00000000009219
$ perf diff | head -13
     9.02%     -0.47%  libc-2.10.1.so               [.] _IO_vfprintf_internal
     2.91%     +0.20%  [kernel]                     [k] __kmalloc
     2.85%     +0.23%  [kernel]                     [k] ext4_htree_store_dirent
     1.99%     +0.62%  [kernel]                     [k] _atomic_dec_and_lock
     2.44%     +0.02%  [kernel]                     [k] half_md4_transform
     2.50%     -0.09%  libc-2.10.1.so               [.] __GI_memmove
     1.88%     +0.01%  [kernel]                     [k] __d_lookup
     2.43%     -0.75%  [kernel]                     [k] _spin_lock
     0.97%     +0.62%  [kernel]                     [k] path_get
     1.99%     -0.42%  libc-2.10.1.so               [.] _int_malloc
$

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1260981109-2621-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-12-16 18:29:10 +01:00
..
include
perf symbols: Simplify symbol machinery setup
2009-11-24 16:37:02 +01:00
abspath.c
perf: Enable more compiler warnings
2009-08-16 10:47:47 +02:00
alias.c
perf_counter tools: Add more warnings and fix/annotate them
2009-07-01 12:49:48 +02:00
cache.h
perf tools: Do not manually count string lengths
2009-10-13 11:55:31 +02:00
callchain.c
perf tools: Unify debug messages mechanisms
2009-10-23 08:22:47 +02:00
callchain.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
color.c
perf tools: Librarize trace_event() helper
2009-08-16 23:06:45 +02:00
color.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
config.c
perf: Enable more compiler warnings
2009-08-16 10:47:47 +02:00
ctype.c
perf tools: Move graph_line and graph_dotted_line from top
2009-11-23 21:55:20 +01:00
data_map.c
perf session: Adopt the sample_type variable
2009-12-14 17:34:56 +01:00
debug.c
perf tools: Unify debug messages mechanisms
2009-10-23 08:22:47 +02:00
debug.h
perf tools: Debug.h needs to include event.h for event_t
2009-11-16 22:05:50 +01:00
debugfs.c
perf tools: Add debugfs utility routines for perf
2009-11-08 18:01:34 +01:00
debugfs.h
perf tools: Add debugfs utility routines for perf
2009-11-08 18:01:34 +01:00
environment.c
perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/
2009-06-06 20:33:43 +02:00
event.c
perf report: Generalize perf_session__fprintf_hists()
2009-12-16 08:53:50 +01:00
event.h
perf probe: Check build-id of vmlinux
2009-12-15 20:22:04 +01:00
exec_cmd.c
perf: Enable more compiler warnings
2009-08-16 10:47:47 +02:00
exec_cmd.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
generate-cmdlist.sh
perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/
2009-06-06 20:33:43 +02:00
header.c
perf session: Ditch register_perf_file_handler
2009-12-14 16:57:15 +01:00
header.h
perf tools: Introduce perf_session class
2009-12-12 07:42:12 +01:00
help.c
perf_counter tools: Add more warnings and fix/annotate them
2009-07-01 12:49:48 +02:00
help.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
hist.c
perf diff: Percent calcs should use double values
2009-12-16 18:29:10 +01:00
hist.h
perf diff: Use perf_session__fprintf_hists just like 'perf record'
2009-12-16 16:53:37 +01:00
levenshtein.c
perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/
2009-06-06 20:33:43 +02:00
levenshtein.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
map.c
perf probe: Check build-id of vmlinux
2009-12-15 20:22:04 +01:00
pager.c
perf_counter tools: Remove dead code
2009-06-27 06:06:39 +02:00
parse-events.c
perf tools: Optimize parse_subsystem_tracepoint_event()
2009-12-07 08:09:29 +01:00
parse-events.h
perf trace: Add filter Suppport
2009-10-15 11:35:23 +02:00
parse-options.c
perf tools: Align long options which have no short forms
2009-12-10 08:30:28 +01:00
parse-options.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
path.c
perf: Enable more compiler warnings
2009-08-16 10:47:47 +02:00
PERF-VERSION-GEN
perf tools: Bump version to 0.0.2
2009-10-16 10:34:28 +02:00
probe-event.c
perf probe: Fix to show which probe point is not found
2009-12-15 20:22:05 +01:00
probe-event.h
perf probe: Fix to show which probe point is not found
2009-12-15 20:22:05 +01:00
probe-finder.c
perf probe: Show need-dwarf message only if it is really needed
2009-12-15 20:22:01 +01:00
probe-finder.h
perf probe: Support event name for --add option
2009-12-15 20:22:03 +01:00
quote.c
perf: Fix read buffer overflow
2009-08-04 11:09:56 +02:00
quote.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
run-command.c
perf: Enable more compiler warnings
2009-08-16 10:47:47 +02:00
run-command.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
session.c
perf report: Generalize perf_session__fprintf_hists()
2009-12-16 08:53:50 +01:00
session.h
perf report: Generalize perf_session__fprintf_hists()
2009-12-16 08:53:50 +01:00
sigchain.c
perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/
2009-06-06 20:33:43 +02:00
sigchain.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
sort.c
perf diff: Use perf_session__fprintf_hists just like 'perf record'
2009-12-16 16:53:37 +01:00
sort.h
perf diff: Use perf_session__fprintf_hists just like 'perf record'
2009-12-16 16:53:37 +01:00
strbuf.c
perf_counter tools: Add more warnings and fix/annotate them
2009-07-01 12:49:48 +02:00
strbuf.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
string.c
perf probe: Add glob matching support on --del
2009-12-15 20:22:03 +01:00
string.h
perf probe: Add glob matching support on --del
2009-12-15 20:22:03 +01:00
strlist.c
perf probe: Fix --del to update current event list
2009-12-15 20:22:01 +01:00
strlist.h
perf tools: Add for_each macros for strlist
2009-12-15 20:22:02 +01:00
svghelper.c
perf timechart: Improve the visual appearance of scheduler delays
2009-10-20 03:39:21 +02:00
svghelper.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
symbol.c
perf report: Generalize perf_session__fprintf_hists()
2009-12-16 08:53:50 +01:00
symbol.h
perf report: Generalize perf_session__fprintf_hists()
2009-12-16 08:53:50 +01:00
thread.c
perf session: Move kmaps to perf_session
2009-12-14 16:57:17 +01:00
thread.h
perf session: Move kmaps to perf_session
2009-12-14 16:57:17 +01:00
trace-event-info.c
perf trace: Read_tracing_data should die() another day
2009-11-21 17:45:59 +01:00
trace-event-parse.c
perf tools: Correct size given to memset
2009-12-10 08:30:26 +01:00
trace-event-perl.c
perf trace/scripting: Check return val of perl_run()
2009-12-15 10:31:32 +01:00
trace-event-perl.h
perf trace/scripting: Fix compile error when libperl not installed
2009-12-07 06:31:37 +01:00
trace-event-read.c
perf tools: Misc small fixes
2009-12-06 18:15:02 +01:00
trace-event.h
perf trace/scripting: Add support for script args
2009-12-15 10:31:31 +01:00
types.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
usage.c
perf top: Fall back to cpu-clock-tick hrtimer sampling if no cycle counter available
2009-06-07 17:31:52 +02:00
util.h
perf tools: Remove unused wrapper routines
2009-11-24 16:37:03 +01:00
values.c
perf: Enable more compiler warnings
2009-08-16 10:47:47 +02:00
values.h
perf tools: Protect header files with a consistent style
2009-09-24 21:27:51 +02:00
wrapper.c
perf tools: Remove unused wrapper routines
2009-11-24 16:37:03 +01:00